參數(shù)資料
型號(hào)： 74LV4799PWDH
廠(chǎng)商： NXP SEMICONDUCTORS
元件分類(lèi)： 電源管理
英文描述： Timer for NiCd and NiMH chargers
中文描述： 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO16
文件頁(yè)數(shù)： 9/18頁(yè)
文件大?。?/td> 162K
代理商： 74LV4799PWDH
Philips Semiconductors
Product specification
74LV4799
Timer for NiCd and NiMH chargers
1998 Apr 20
9
AC CHARACTERISTICS
GND = 0V; t
r
= t
f
≤
2.5ns; C
L
= 50pF
TEST CONDITIONS
T
amb
(
°
C)
SYMBOL
PARAMETER
+25
TYP
–4
–2
50
50
50
50
67
65
0 to +70
MIN
UNIT
V
CC
(V)
1.0
6.0
1.0
6.0
1.0
6.0
1.0
6.0
1.0
6.0
1.0
6.0
MIN
–11
–9
–
–
–
–
–
–
100
100
MAX
+3
+5
MAX
f
Oscillator frequency spread
Oscillator frequency s read
Any resistor or capacitor according
the application information, see note 1
%
δ
LED
Duty factor at pin 1
Duty factor at in 1
See Note 2
%
δ
MOLLI
Duty factor at pin 6
Duty factor at in 6
See Note 3
%
d b
t
deb
Debounce suppression at pin 9
ms
ression at in 9
f
i(max)
Maximum frequency
sense input
kHz
i( i )
f
i(min)
Minimum frequency
sense input
50
50
Hz
NOTES:
1. The oscillator frequency can be calculated by: f
2. During blinking.
3. An output signal of four periods will appear in case of discharged batteries and DIS is switched HIGH.
0.36
R
C1
APPLICATION INFORMATION
Oscillator.
The frequency will be determined by the external components R
C
, R
D
, R
S
, and C
1
. The frequencies can be calculated by the following
expressions: f
R
C
R
C1
R
S
R
C
and C1 determine the charge time.
R
D
and C1 determine the discharge time.
R
S
and C1 determine the self-charge time.
0.36
C1; f
0.36
; f
0.36
C1.
The charge, discharge and self-discharge times can be calculated as follows:
Charge time
2
22
f
C
; Discharge time
2
18
f
D
; Self-discharge time
2
27
f
S
In the trickle charge mode, the average charge current will be reduced by a factor:
1
3 x R
S
4 x R
C
1
External components range
TEST CONDITIONS
T
amb
(
°
C)
+25
TYP
SYMBOL
PARAMETER
UNIT
V
CC
(V)
1.0
2.0
4.5
6.0
1.0
2.0
4.5
6.0
1.0
2.0
4.5
6.0
V
1
OTHER
MIN
5.360
1.150
0.562
0.511
42.20
9.09
4.22
3.32
MAX
100
100
100
100
825
825
825
825
no limit
no limit
no limit
no limit
k
R
C
/R
D
Resistor range
C1 = 0 22
μ
C1 = 0.22
F
k
k
R
S
Resistor range
C1 = 0 22
μ
C1 = 0.22
F
k
pF
C1
Capacitor range
Ca acitor range
pF
相關(guān)PDF資料
PDF描述
74LV4799 Timer for NiCd and NiMH chargers(為 NiCd和NiMH 充電的定時(shí)器)
74LV4799D Timer for NiCd and NiMH chargers
74LV4799N Timer for NiCd and NiMH chargers
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